深海脐带缆弯曲加强器时域疲劳敏感性分析

Sensitivity Analyses for Time-Domain Fatigue Life of Umbilical Bending Stiffener

鉴于聚合物材料制作的弯曲加强器非线性特性显著,传统频域疲劳分析方法已不适用,而疲劳强度是弯曲加强器设计关键难点,建立了弯曲加强器分析的数学模型,给出了基于数学模型的弯曲加强器疲劳分析方法.从整体到局部进行时域疲劳分析,对影响弯曲加强器疲劳性能的参数进行敏感性分析,讨论了各个参数对弯曲加强器疲劳性能的影响.文中提出的方法和所得的结论可为深海脐带缆弯曲加强器分析设计提供参考.

Nonlinear characteristic of bending stiffener made from polymer is obvious and traditional fatigue analysis method in frequency domain is not applicable.Fatigue strength is the crucial and difficult aspect of bending stiffener design.Mathematical model for bending stiffener analysis was established,and fatigue analysis method of bending stiffener based on mathematical model was introduced.Fatigue analysis in time domain employs the thought from global analysis to local analysis.Then sensitivity analysis was performed to study the effects of different parameters on fatigue life of bending stiffener,and the effects of different parameters were discussed.The method proposed in this work and the conclusions can be the guide for bending stiffener of deepwater umbilical design.